2006 Lexus GS430 Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2006 Lexus GS430

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2006 Lexus GS430 cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty or malfunctioning sensor can lead to incorrect readings, causing issues with engine performance or other systems relying on accurate data.
  • Control Module: A faulty control module can lead to erratic vehicle behavior or failure of various electronic systems due to improper signal processing.
  • Throttle: A faulty throttle body or a defective accelerator pedal position sensor may be causing inconsistent throttle response.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2006 Lexus GS430 cruise control isn't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

When the vehicle speed sensor fails or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly. Also, the traction control and anti lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. You may notice the vehicle hesitate to accelerate, cruise control will not function properly, and the vehicle may not shift properly through all of the gears.

In the event that a wheel speed sensor fails, the ABS, traction control system (TCS) and manufacturer specific stability control system lights will illuminate, informing the driver that the systems are disabled. The vehicle will be more prone to tire slip, and normal driving patterns may need to be adjusted to correct for the loss of computer control. On older vehicle's, the speedometer can be affected, causing illumination of the check engine light as well.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

What are the steps to diagnose the non-functioning cruise control in a 2006 Lexus GS430?

To effectively diagnose the non-functioning cruise control in your 2006 Lexus GS430, start with a systematic approach that prioritizes simpler checks before moving on to more complex diagnostics. Begin by inspecting the cruise control fuse located in the fuse box; a blown fuse is a straightforward fix that can often resolve the issue. Next, examine the cruise control switch on the steering wheel to ensure it is operational, as a faulty switch may require replacement. Following this, check the speed sensors, as they play a crucial role in the cruise control system's functionality; any malfunction here can disrupt the system. Utilizing an OBD-II scanner to scan for error codes can provide valuable insights into specific issues affecting the cruise control. Additionally, inspect the vacuum lines for any leaks or damage, as these can significantly impact performance. Finally, test the cruise control module to confirm it is functioning correctly, as a malfunctioning module can be the root cause of the problem. By following this structured diagnostic approach, you can efficiently identify and address the underlying issues affecting your vehicle's cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2006 Lexus GS430?

When troubleshooting cruise control issues in a 2006 Lexus GS430, it's essential to consider several common problems that could be at play. One of the primary culprits is a faulty brake pedal switch, which may fail to signal the system when the brake is engaged, thereby preventing cruise control from activating. Additionally, a defective speed sensor can disrupt the system's ability to maintain a steady speed, leading to erratic performance or complete failure. Another potential issue is a blown fuse, which can cut power to the cruise control system entirely. It's also important to check for vacuum leaks, as the cruise control relies on vacuum pressure to function correctly; any leaks can compromise its operation. Lastly, a malfunctioning cruise control module may be responsible for the system's inability to engage or maintain speed. By understanding these common problems, DIYers can better diagnose and address the issues affecting their vehicle's cruise control system.

How urgent is it to address the non-functioning cruise control in a 2006 Lexus GS430?

When it comes to a non-functioning cruise control in a 2006 Lexus GS430, the urgency to address the issue cannot be overstated. While it may not seem like an immediate emergency, neglecting this problem can lead to significant safety risks. A malfunctioning cruise control system can cause erratic speed changes, which may result in loss of control, especially during long highway drives where maintaining a steady speed is crucial. Additionally, the comfort and convenience that cruise control provides during extended trips are compromised, leading to increased driver fatigue. Furthermore, from a financial perspective, keeping all vehicle systems, including cruise control, in optimal condition is essential for maintaining resale value. A well-maintained vehicle signals to potential buyers that it has been cared for, making it more appealing in the market. Therefore, addressing the non-functioning cruise control promptly is vital for ensuring safety, enhancing driving comfort, and preserving the vehicle's value.

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